Sand-blast machine



Sept. 14, 1926.

H. F. HOEVEL SAND BLAST MACHINE Filed Dec. 21, 1921 HERMAN F. HOE VEL,

BY w. 6?

ATTORNEY Patented Sept. 14, 1926.

UNITED SA'ltm HERMAN r. HOEVEL, or new Yon-K, n. Y.

SAND-BLAST MACHINE.

Application filed December 21, 1921.

My invention relates to improvements in sand blast machines, and particularly to that class of machines in which arotary drum or similar receptacle carries the casttings or things to be cleaned by the sand blast, and in this type of machine the east ings when cleaned are dropped, and the drum or barrel refilled. It is customary and desirable in machines of this type to l collect the sand which drops from the rel in an elevator, and reuse it for cleaning purposes. The means for collecting the sand and directing it to the elevator as it drops from the barrel, is likely to interfere b with the discharge of 'the castings being operated. on. "When attempts have been made to have the guide chute for the sand swing out of the way of the barrel or drum so as to provide a clear passage tor the $11 charge under treatment, it has necessitated the raising of the barrel to such a height as to make it inconvenient to load. The ol ject of my invention is to obviate these ditheulties, and produce a simple attachment by Which a guide chute will deflect the sand passing from the barrel to an elevator or analogous device for saving it for re-use, and further to provide means whereby the guide chute can be partly folded, or at least disposed out of the path of the charge in the barrel or drum, so that the charge can be conveniently dropped into a wheelbarrow or other receptacle ready to dispose of it. My invention is also intended to produce a chute of this character which can be very easily and inexpensively applied to existing types of machines, and to cleaning barrels or drums when arranged at ordinary heights. My invention is further intended to facilitate the discharge of the charge into a conveyance, or at the foot of the machine as desired. This and other ad vantages will be more readily understood from the description which follows.

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar reference characters indicate corresponding parts in all the views.

Figure 1 is a sectional elevation of the machine embodying my invention, showing the chute in its position while the machine is in operation.

Figure 2 is a similar view but with the chute thrown out of the Way so as to permit Serial No. 523,827.

the discharge of a charge from the barrel into a receptacle, and

Figure 3 is a view similar to the first two figures but illustrating a diilerent means for disposing of the charge.

way of example I have shown my invention as applied to a rather conventional type of machine having a rotary drum 10, in which a charge to be cleaned is carried, and this is mounted in a suitable casing 11, and its sand is raised by an elevator 12 for re-usin-g. Obviously any usual or preferred type of drum can be used, and any means for raising the sand for re-use, without affecting the principle of my invention. In the type shown, however, I have illustrated the customary blast nozzle 14, and a door 15 in the drum or barrel 10, to facilitate loading and unloading it. Whilethe barrel can be rotated in any convenient way, i have shown it mounted on rollers.

Beneath the barrel is a hopper comprising opposed inclined members 16, leaving an opening 17 between them, and to facilitate the collection of sand and the disposal of the chute, I make the latter preferably in two parts 18 and 19, which are hinged together as shown at 20, and the lower member 19 of which is hinged near the foot of the elevator 12, as shown clearly at 21. The upper member is provided at its opposite edges with rollers 22 which run in suitable curved guides 23, so that the chute can be straightened up to the position shown in Figure l, or partly folded and tipped baclr to the position shown in Figure 2. hen in the first position, it will be seen that the sand which is constantly dropping through the barrel or drum 10, will also drop through. the opening 17, and be guided by the chute 1819 to the elevator 12 or other means of raising the sand. When the sand blast is stopped and the charge is to be discharged, however, the chute is tipped back to the position shown in Figure 2, thus leaving a clear space through the hopper so that the charge may be dropped into a wheelbarrow 23 or analogous receptacle adapted to receive it.

In some cases it is desirable to have the charge dropped at the foot of the machine, and in such case instead of the wheelbarrow 24, I use an incli ned removable bench 25 which will deflect the charge to the fron of the machine.

It will be evident that the chute can be moved into either of its desired positions in many ways. I have shown, however, a simple means in which a long crank 26 is fixed to the pivot 21 at the foot of the chute, and the crank at its upper end is provided with a link 27 which extends forward and terminates in a handle 28, so that by moving the handle 28 in or out, the pivot 21 may be turned, and the chute straightened out to the position shown in Figure l, or thrown back to the position shown in Figure 2.

It will be evident that the detail construction of the chute, and the means for guiding it, and also for operating it, can be changed considerably without departing from the principle of my invention; and it will be readily seen that in the form shown it is easily adapted to machines of the type illustrated and forms a convenient apparatus for saving the sand, and for facilitating the discharge of the castings or other things under treatment.

I have shown my improvements in connection with a known type of sand blast, but my invention lies in the chute construction and bench below the cleaning receptacle, and it will be understood that so far as the invention is concerned, the part 10 might be a spraying device, or any other cleaning 1'eceptacle.

I claim l. A sand blast machine having a sandingreceptacle, a chute consistingof a plurality of pivotally connected parts hingedly supported below the sanding receptacle, and means for deflecting the entire body of the chute out of the path of material dropped from the sanding receptacle.

2. The combination with a sand blast machine having a rotary sanding receptacle and means for saving the used sand, of a chute adapted to be held at an inclination to the receptacle to deflect the sand to the saving means, and means for shortening the chute and swinging it out of the path of material dropped from the sanding receptacle.

3. In a sand blast machine the combination with a rotary sanding receptacle and means for raising used sand, of a chute having two parts hinged together, the lower part being pivoted adjacent to the sand raising means, the upper part being supported in laterally disposed guides. and means for ringing the chute in and out of operative v.iition. 4. In a sand blast machine the combination with a rotary sanding receptacle and the sand elevator, of an open bottomed hopper below the sanding receptacle, and a chute pivoted below the hopper near the foot of the elevator. said chute being in hinged sections with its upper section suitably guided. and means for swinging the chute into and out ct operative position.

5. The combination with a sand blast machine having a rotary sanding receptacle, of an open bottomed hopper below the sandinn; receptacle. a chute in hinged sections pivoted at its foot at one side of the hopper opening and having its end movable in guides extending opposite the path of the hopper discharge, and means for moving the chute into and out of operative position.

6. A machine according to claim 5, characterized by a movable in lined bench adapted to be placed beneath the hopper opening.

HERMAN F. HOEVEL. 

